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Daily, monthly and annual yields can be displayed graphically in a chart.
①
Period on an individual yield (here: day yield)
②
Y axis
1)
2)
3)
③
X axis: Time in hours/days/months/years
④
Total of all individual yields shown in the diagram, in kWh
The graphical representation can show annual yields for the last 20 years.
1)
Yield in kWh
2)
With addition of
„M“
: : yield in MWh
3)
The scaling changes depending on the maximum value.
Chapter 7 „Event messages“ on page 55
①
X axis: input voltage in V
②
Y axis: power in kW
③
Peak = MPP
If the
„Ch. Curve“
menu item is called, the inverter records the PV gener‐
ator characteristic curve and then displays it (Fig. upper left).
The following applies:
n
The inverter traverses the input voltage range and records the power
generated over this range. Duration: a few seconds; is displayed.
n
The MPP is at the peak of the PV generator characteristic curve.
n
This peak and the PV generator characteristic curve change with the
level of solar irradiation.
n
Multiple peaks are a sign of partial shadowing (Fig. left).
n
If the top of the curve is flat, the inverter can possibly no longer feed
power into the grid.
Graphical yield (day,
month, year)
Event messages
PV generator character‐
istic curve
Structure and function
11/2017 | DOC01664604 | KOSTAL operating instructions PIKO inverter 1.5 - 4.2 MP
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